/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:23:32,883 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:23:32,884 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:23:32,915 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:23:32,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:23:32,940 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:23:32,942 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:23:32,943 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:23:32,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:23:32,947 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:23:32,950 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:23:32,957 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:23:32,958 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:23:32,968 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:23:32,969 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:23:32,972 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:23:32,974 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:23:32,984 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:23:32,985 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:23:32,986 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:23:32,990 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 15:23:33,024 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:23:33,024 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:23:33,025 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:23:33,026 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:23:33,026 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:23:33,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:23:33,026 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:23:33,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:23:33,026 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:23:33,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:23:33,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:23:33,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:23:33,027 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:23:33,027 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:23:33,027 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:23:33,027 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:23:33,027 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:23:33,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:23:33,028 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:23:33,028 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:23:33,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:23:33,028 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:23:33,028 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:23:33,029 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:23:33,029 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:23:33,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:23:33,029 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:23:33,029 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:23:33,029 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:23:33,336 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:23:33,358 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:23:33,360 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:23:33,361 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:23:33,362 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:23:33,363 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound20.c [2021-05-02 15:23:33,426 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/393b4cf36/806bc2275d77464181986d3b04b30766/FLAG0b94b6e4d [2021-05-02 15:23:33,850 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:23:33,851 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound20.c [2021-05-02 15:23:33,857 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/393b4cf36/806bc2275d77464181986d3b04b30766/FLAG0b94b6e4d [2021-05-02 15:23:33,877 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/393b4cf36/806bc2275d77464181986d3b04b30766 [2021-05-02 15:23:33,879 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:23:33,882 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:23:33,883 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:23:33,883 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:23:33,887 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:23:33,888 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:23:33" (1/1) ... [2021-05-02 15:23:33,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fcf2572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:33, skipping insertion in model container [2021-05-02 15:23:33,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:23:33" (1/1) ... [2021-05-02 15:23:33,895 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:23:33,910 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:23:34,035 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound20.c[525,538] [2021-05-02 15:23:34,046 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:23:34,053 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:23:34,067 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound20.c[525,538] [2021-05-02 15:23:34,072 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:23:34,087 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:23:34,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:34 WrapperNode [2021-05-02 15:23:34,087 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:23:34,088 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:23:34,088 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:23:34,089 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:23:34,123 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:34" (1/1) ... [2021-05-02 15:23:34,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:34" (1/1) ... [2021-05-02 15:23:34,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:34" (1/1) ... [2021-05-02 15:23:34,130 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:34" (1/1) ... [2021-05-02 15:23:34,134 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:34" (1/1) ... [2021-05-02 15:23:34,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:34" (1/1) ... [2021-05-02 15:23:34,139 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:34" (1/1) ... [2021-05-02 15:23:34,141 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:23:34,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:23:34,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:23:34,142 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:23:34,142 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:23:34,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:23:34,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:23:34,205 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:23:34,205 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:23:34,205 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:23:34,206 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:23:34,206 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:23:34,206 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:23:34,207 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:23:34,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:23:34,207 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 15:23:34,207 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:23:34,208 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:23:34,208 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:23:34,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:23:34,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:23:34,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:23:34,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:23:34,210 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:23:34,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:23:34,483 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:23:34,483 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 15:23:34,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:23:34 BoogieIcfgContainer [2021-05-02 15:23:34,484 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:23:34,485 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:23:34,486 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:23:34,488 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:23:34,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:23:33" (1/3) ... [2021-05-02 15:23:34,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@322d07d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:23:34, skipping insertion in model container [2021-05-02 15:23:34,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:34" (2/3) ... [2021-05-02 15:23:34,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@322d07d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:23:34, skipping insertion in model container [2021-05-02 15:23:34,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:23:34" (3/3) ... [2021-05-02 15:23:34,507 INFO L111 eAbstractionObserver]: Analyzing ICFG geo3-ll_unwindbound20.c [2021-05-02 15:23:34,511 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:23:34,514 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:23:34,528 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:23:34,545 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:23:34,546 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:23:34,546 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:23:34,546 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:23:34,546 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:23:34,546 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:23:34,546 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:23:34,546 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:23:34,559 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 15:23:34,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 15:23:34,563 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:34,563 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:23:34,564 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:34,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:34,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1665267581, now seen corresponding path program 1 times [2021-05-02 15:23:34,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:34,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415396775] [2021-05-02 15:23:34,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:34,683 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:34,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1753988715] [2021-05-02 15:23:34,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:34,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:23:34,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-02 15:23:34,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:23:34,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:23:34,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:23:34,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415396775] [2021-05-02 15:23:34,825 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:23:34,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753988715] [2021-05-02 15:23:34,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753988715] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:23:34,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:23:34,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-02 15:23:34,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725097297] [2021-05-02 15:23:34,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-02 15:23:34,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:23:34,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-02 15:23:34,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 15:23:34,847 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:23:34,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:23:34,866 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-02 15:23:34,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-02 15:23:34,868 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 15:23:34,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:23:34,877 INFO L225 Difference]: With dead ends: 38 [2021-05-02 15:23:34,878 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 15:23:34,881 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 15:23:34,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 15:23:34,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 15:23:34,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:23:34,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-02 15:23:34,913 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-02 15:23:34,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:23:34,914 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-02 15:23:34,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:23:34,914 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-02 15:23:34,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 15:23:34,916 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:34,916 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:23:35,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-02 15:23:35,135 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:35,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:35,135 INFO L82 PathProgramCache]: Analyzing trace with hash -318583316, now seen corresponding path program 1 times [2021-05-02 15:23:35,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:35,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811886822] [2021-05-02 15:23:35,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:35,159 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:35,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [126469973] [2021-05-02 15:23:35,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:35,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:23:35,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 15:23:35,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:23:35,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:35,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:35,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:35,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:35,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:35,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:23:35,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:23:35,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811886822] [2021-05-02 15:23:35,358 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:23:35,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126469973] [2021-05-02 15:23:35,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126469973] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:23:35,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:23:35,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 15:23:35,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006417413] [2021-05-02 15:23:35,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 15:23:35,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:23:35,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 15:23:35,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:23:35,365 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:23:35,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:23:35,382 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-05-02 15:23:35,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 15:23:35,384 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 15:23:35,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:23:35,385 INFO L225 Difference]: With dead ends: 26 [2021-05-02 15:23:35,385 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 15:23:35,385 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:23:35,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 15:23:35,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-02 15:23:35,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:23:35,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-02 15:23:35,390 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-05-02 15:23:35,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:23:35,390 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-02 15:23:35,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:23:35,390 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-02 15:23:35,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 15:23:35,391 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:35,391 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:23:35,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:35,592 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:35,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:35,593 INFO L82 PathProgramCache]: Analyzing trace with hash -316795856, now seen corresponding path program 1 times [2021-05-02 15:23:35,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:35,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286810588] [2021-05-02 15:23:35,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:35,604 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:35,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [339704465] [2021-05-02 15:23:35,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:35,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:23:35,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 15:23:35,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:23:35,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:35,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:35,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:23:35,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:23:35,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286810588] [2021-05-02 15:23:35,728 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:23:35,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339704465] [2021-05-02 15:23:35,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339704465] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:23:35,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:23:35,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 15:23:35,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280156876] [2021-05-02 15:23:35,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:23:35,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:23:35,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:23:35,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:23:35,730 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:23:35,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:23:35,772 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-05-02 15:23:35,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 15:23:35,772 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 15:23:35,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:23:35,774 INFO L225 Difference]: With dead ends: 28 [2021-05-02 15:23:35,774 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 15:23:35,775 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:23:35,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 15:23:35,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 15:23:35,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 15:23:35,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-02 15:23:35,786 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2021-05-02 15:23:35,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:23:35,786 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-02 15:23:35,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:23:35,787 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-02 15:23:35,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 15:23:35,789 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:35,789 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:23:36,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:36,009 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:36,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:36,010 INFO L82 PathProgramCache]: Analyzing trace with hash -2089867248, now seen corresponding path program 1 times [2021-05-02 15:23:36,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:36,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209540362] [2021-05-02 15:23:36,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:36,034 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:36,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [75141191] [2021-05-02 15:23:36,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:36,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:23:36,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:23:36,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:23:36,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:36,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:36,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:36,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:36,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:36,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:36,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:36,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:36,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:23:36,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:23:36,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209540362] [2021-05-02 15:23:36,197 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:23:36,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75141191] [2021-05-02 15:23:36,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75141191] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:23:36,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:23:36,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 15:23:36,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818502619] [2021-05-02 15:23:36,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:23:36,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:23:36,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:23:36,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:23:36,199 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:23:36,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:23:36,223 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-05-02 15:23:36,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:23:36,223 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 15:23:36,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:23:36,224 INFO L225 Difference]: With dead ends: 34 [2021-05-02 15:23:36,224 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 15:23:36,225 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:23:36,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 15:23:36,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 15:23:36,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 15:23:36,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-05-02 15:23:36,229 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2021-05-02 15:23:36,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:23:36,229 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-05-02 15:23:36,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:23:36,229 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-05-02 15:23:36,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 15:23:36,230 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:36,230 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:23:36,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:36,431 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:36,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:36,432 INFO L82 PathProgramCache]: Analyzing trace with hash -2088079788, now seen corresponding path program 1 times [2021-05-02 15:23:36,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:36,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465592111] [2021-05-02 15:23:36,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:36,443 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:36,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843661225] [2021-05-02 15:23:36,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:23:36,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 15:23:36,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:23:36,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:36,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:36,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:23:36,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:23:36,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465592111] [2021-05-02 15:23:36,581 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:23:36,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843661225] [2021-05-02 15:23:36,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843661225] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:23:36,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:23:36,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:23:36,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71527500] [2021-05-02 15:23:36,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:23:36,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:23:36,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:23:36,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:23:36,583 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:23:41,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:23:41,198 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-05-02 15:23:41,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:23:41,199 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 15:23:41,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:23:41,200 INFO L225 Difference]: With dead ends: 36 [2021-05-02 15:23:41,200 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 15:23:41,200 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:23:41,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 15:23:41,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-05-02 15:23:41,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 15:23:41,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-05-02 15:23:41,206 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 20 [2021-05-02 15:23:41,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:23:41,206 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-05-02 15:23:41,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:23:41,206 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-05-02 15:23:41,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 15:23:41,207 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:41,207 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:23:41,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:41,408 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:41,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:41,408 INFO L82 PathProgramCache]: Analyzing trace with hash -475222577, now seen corresponding path program 1 times [2021-05-02 15:23:41,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:41,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947967824] [2021-05-02 15:23:41,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:41,416 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:41,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1423087380] [2021-05-02 15:23:41,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:41,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:23:41,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 15:23:41,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:23:41,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:41,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:41,553 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:23:41,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:23:41,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947967824] [2021-05-02 15:23:41,553 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:23:41,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423087380] [2021-05-02 15:23:41,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423087380] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:23:41,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:23:41,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:23:41,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787185092] [2021-05-02 15:23:41,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:23:41,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:23:41,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:23:41,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:23:41,555 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 15:23:43,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:23:43,631 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2021-05-02 15:23:43,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:23:43,632 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2021-05-02 15:23:43,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:23:43,633 INFO L225 Difference]: With dead ends: 39 [2021-05-02 15:23:43,633 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 15:23:43,634 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:23:43,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 15:23:43,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 15:23:43,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 23 states have internal predecessors, (23), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 15:23:43,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-05-02 15:23:43,639 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 26 [2021-05-02 15:23:43,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:23:43,639 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-05-02 15:23:43,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 15:23:43,640 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-05-02 15:23:43,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:23:43,640 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:43,640 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:23:43,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:43,863 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:43,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:43,863 INFO L82 PathProgramCache]: Analyzing trace with hash -696181196, now seen corresponding path program 2 times [2021-05-02 15:23:43,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:43,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124965008] [2021-05-02 15:23:43,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:43,871 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:43,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [149633167] [2021-05-02 15:23:43,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:43,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:23:43,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:23:43,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 15:23:43,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:23:43,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:43,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:43,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:43,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:43,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:43,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:44,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:44,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:44,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:44,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:44,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:44,051 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:23:44,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:23:44,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124965008] [2021-05-02 15:23:44,052 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:23:44,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149633167] [2021-05-02 15:23:44,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149633167] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:23:44,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:23:44,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 15:23:44,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138233898] [2021-05-02 15:23:44,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:23:44,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:23:44,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:23:44,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:23:44,054 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 15:23:44,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:23:44,104 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-05-02 15:23:44,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:23:44,105 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 15:23:44,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:23:44,106 INFO L225 Difference]: With dead ends: 42 [2021-05-02 15:23:44,106 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 15:23:44,106 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 28.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:23:44,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 15:23:44,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 15:23:44,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 15:23:44,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-05-02 15:23:44,111 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 28 [2021-05-02 15:23:44,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:23:44,111 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-05-02 15:23:44,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 15:23:44,112 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-05-02 15:23:44,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:23:44,112 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:44,112 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:23:44,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:44,338 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:44,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:44,339 INFO L82 PathProgramCache]: Analyzing trace with hash -694393736, now seen corresponding path program 2 times [2021-05-02 15:23:44,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:44,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605281707] [2021-05-02 15:23:44,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:44,362 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:44,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [590483535] [2021-05-02 15:23:44,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:44,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:23:44,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:23:44,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 15:23:44,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:23:48,872 WARN L205 SmtUtils]: Spent 2.26 s on a formula simplification that was a NOOP. DAG size: 16 [2021-05-02 15:23:53,031 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 15 [2021-05-02 15:23:53,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:53,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:53,077 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 9 refuted. 3 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:23:53,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:23:53,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605281707] [2021-05-02 15:23:53,077 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:23:53,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590483535] [2021-05-02 15:23:53,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590483535] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:23:53,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:23:53,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:23:53,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333985582] [2021-05-02 15:23:53,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:23:53,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:23:53,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:23:53,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=69, Unknown=2, NotChecked=0, Total=90 [2021-05-02 15:23:53,079 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 15:24:07,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:24:07,044 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-05-02 15:24:07,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:24:07,045 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 15:24:07,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:24:07,045 INFO L225 Difference]: With dead ends: 43 [2021-05-02 15:24:07,045 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 15:24:07,046 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 8530.7ms TimeCoverageRelationStatistics Valid=30, Invalid=100, Unknown=2, NotChecked=0, Total=132 [2021-05-02 15:24:07,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 15:24:07,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-05-02 15:24:07,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 29 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 15:24:07,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-05-02 15:24:07,051 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 28 [2021-05-02 15:24:07,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:24:07,052 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-05-02 15:24:07,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 15:24:07,052 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-05-02 15:24:07,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 15:24:07,053 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:24:07,053 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:24:07,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-02 15:24:07,254 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:24:07,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:24:07,254 INFO L82 PathProgramCache]: Analyzing trace with hash 618442840, now seen corresponding path program 3 times [2021-05-02 15:24:07,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:24:07,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139346650] [2021-05-02 15:24:07,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:24:07,260 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:24:07,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1723057590] [2021-05-02 15:24:07,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:24:07,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 15:24:07,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:24:07,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 15:24:07,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:24:09,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:09,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:09,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:09,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:09,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:09,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:09,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:09,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:10,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:10,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:10,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:10,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:10,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:12,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:12,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:12,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:12,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:12,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:12,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:12,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:14,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:14,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:14,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:14,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:14,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:14,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:28,946 WARN L205 SmtUtils]: Spent 10.55 s on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 15:24:28,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:28,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:30,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:30,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:31,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:31,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:31,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:33,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:33,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:33,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:33,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:33,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:33,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:49,928 WARN L205 SmtUtils]: Spent 10.19 s on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 15:24:49,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:49,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:51,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:51,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:51,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:51,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:51,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:54,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:54,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:54,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:54,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:54,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:54,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:56,187 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~z~0_BEFORE_CALL_10 Int) (v_main_~y~0_BEFORE_CALL_8 Int) (v_main_~x~0_BEFORE_CALL_8 Int) (v_main_~a~0_BEFORE_CALL_11 Int)) (let ((.cse1 (+ v_main_~x~0_BEFORE_CALL_8 (* v_main_~a~0_BEFORE_CALL_11 (- 1))))) (and (let ((.cse0 (div .cse1 v_main_~z~0_BEFORE_CALL_10))) (= (+ (* v_main_~z~0_BEFORE_CALL_10 .cse0) v_main_~a~0_BEFORE_CALL_11) (+ (* (div v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_10) v_main_~z~0_BEFORE_CALL_10 v_main_~a~0_BEFORE_CALL_11) .cse0))) (= (mod v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_10) 0) (= (mod .cse1 v_main_~z~0_BEFORE_CALL_10) 0) (not (= v_main_~z~0_BEFORE_CALL_10 0)) (not (= (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~y~0_BEFORE_CALL_8 v_main_~a~0_BEFORE_CALL_11) v_main_~x~0_BEFORE_CALL_8) (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~x~0_BEFORE_CALL_8) v_main_~a~0_BEFORE_CALL_11)))))) is different from false [2021-05-02 15:24:58,218 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~z~0_BEFORE_CALL_10 Int) (v_main_~y~0_BEFORE_CALL_8 Int) (v_main_~x~0_BEFORE_CALL_8 Int) (v_main_~a~0_BEFORE_CALL_11 Int)) (let ((.cse1 (+ v_main_~x~0_BEFORE_CALL_8 (* v_main_~a~0_BEFORE_CALL_11 (- 1))))) (and (let ((.cse0 (div .cse1 v_main_~z~0_BEFORE_CALL_10))) (= (+ (* v_main_~z~0_BEFORE_CALL_10 .cse0) v_main_~a~0_BEFORE_CALL_11) (+ (* (div v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_10) v_main_~z~0_BEFORE_CALL_10 v_main_~a~0_BEFORE_CALL_11) .cse0))) (= (mod v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_10) 0) (= (mod .cse1 v_main_~z~0_BEFORE_CALL_10) 0) (not (= v_main_~z~0_BEFORE_CALL_10 0)) (not (= (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~y~0_BEFORE_CALL_8 v_main_~a~0_BEFORE_CALL_11) v_main_~x~0_BEFORE_CALL_8) (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~x~0_BEFORE_CALL_8) v_main_~a~0_BEFORE_CALL_11)))))) is different from true [2021-05-02 15:24:58,218 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 0 refuted. 1 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 15:24:58,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:24:58,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139346650] [2021-05-02 15:24:58,219 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:24:58,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723057590] [2021-05-02 15:24:58,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723057590] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:24:58,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:24:58,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:24:58,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530539951] [2021-05-02 15:24:58,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:24:58,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:24:58,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:24:58,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=49, Unknown=8, NotChecked=14, Total=90 [2021-05-02 15:24:58,220 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:25:02,393 WARN L205 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 37 DAG size of output: 3 [2021-05-02 15:25:12,726 WARN L205 SmtUtils]: Spent 8.21 s on a formula simplification. DAG size of input: 43 DAG size of output: 6 [2021-05-02 15:25:48,113 WARN L205 SmtUtils]: Spent 19.50 s on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-05-02 15:27:18,859 WARN L205 SmtUtils]: Spent 1.17 m on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-05-02 15:27:20,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:27:20,876 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-05-02 15:27:20,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:27:20,885 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-05-02 15:27:20,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:27:20,886 INFO L225 Difference]: With dead ends: 46 [2021-05-02 15:27:20,886 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 15:27:20,887 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 159988.3ms TimeCoverageRelationStatistics Valid=46, Invalid=122, Unknown=18, NotChecked=24, Total=210 [2021-05-02 15:27:20,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 15:27:20,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-02 15:27:20,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.037037037037037) internal successors, (28), 28 states have internal predecessors, (28), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 15:27:20,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-05-02 15:27:20,894 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2021-05-02 15:27:20,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:27:20,894 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-05-02 15:27:20,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:27:20,894 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-05-02 15:27:20,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 15:27:20,895 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:27:20,895 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:27:21,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:27:21,103 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:27:21,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:27:21,103 INFO L82 PathProgramCache]: Analyzing trace with hash 620230300, now seen corresponding path program 3 times [2021-05-02 15:27:21,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:27:21,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32748096] [2021-05-02 15:27:21,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:27:21,112 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:27:21,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024906266] [2021-05-02 15:27:21,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:27:21,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 15:27:21,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:27:21,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 15:27:21,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:27:24,314 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 15:27:24,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:24,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:26,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:26,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:26,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:26,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:26,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:26,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:26,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:26,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:26,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:26,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:26,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:26,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:26,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:26,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:26,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:26,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:26,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:26,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:30,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:30,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:30,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:30,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:30,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:30,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:30,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:32,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:32,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:32,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:32,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:32,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:32,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:32,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:35,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:35,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:35,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:35,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:35,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:35,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:35,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:37,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:37,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:37,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:37,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:37,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:37,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:37,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:39,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:39,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:39,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:39,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:39,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:39,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:39,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:39,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:41,239 WARN L838 $PredicateComparison]: unable to prove that (or (and (= |c___VERIFIER_assert_#in~cond| 0) (exists ((v_main_~a~0_BEFORE_CALL_15 Int) (v_main_~z~0_BEFORE_CALL_14 Int) (v_main_~x~0_BEFORE_CALL_9 Int)) (let ((.cse0 (+ (* v_main_~a~0_BEFORE_CALL_15 (- 1)) v_main_~x~0_BEFORE_CALL_9))) (let ((.cse2 (div .cse0 v_main_~z~0_BEFORE_CALL_14))) (let ((.cse1 (* v_main_~z~0_BEFORE_CALL_14 .cse2)) (.cse3 (* v_main_~a~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_14))) (and (not (= v_main_~z~0_BEFORE_CALL_14 0)) (= (mod .cse0 v_main_~z~0_BEFORE_CALL_14) 0) (= (mod (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* .cse2 (- 1))) .cse3) 0) (not (= (+ (* v_main_~a~0_BEFORE_CALL_15 (div (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* (- 1) .cse2)) .cse3) v_main_~z~0_BEFORE_CALL_14 v_main_~z~0_BEFORE_CALL_14) v_main_~x~0_BEFORE_CALL_9) (+ v_main_~a~0_BEFORE_CALL_15 (* v_main_~z~0_BEFORE_CALL_14 v_main_~x~0_BEFORE_CALL_9)))) (not (= .cse3 0)))))))) (= |c___VERIFIER_assert_#in~cond| 1)) is different from false [2021-05-02 15:27:41,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:41,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:43,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:47,657 WARN L838 $PredicateComparison]: unable to prove that (or (= c___VERIFIER_assert_~cond 1) (and (= c___VERIFIER_assert_~cond 0) (exists ((v_main_~a~0_BEFORE_CALL_15 Int) (v_main_~z~0_BEFORE_CALL_14 Int) (v_main_~x~0_BEFORE_CALL_9 Int)) (let ((.cse0 (+ (* v_main_~a~0_BEFORE_CALL_15 (- 1)) v_main_~x~0_BEFORE_CALL_9))) (let ((.cse2 (div .cse0 v_main_~z~0_BEFORE_CALL_14))) (let ((.cse1 (* v_main_~z~0_BEFORE_CALL_14 .cse2)) (.cse3 (* v_main_~a~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_14))) (and (not (= v_main_~z~0_BEFORE_CALL_14 0)) (= (mod .cse0 v_main_~z~0_BEFORE_CALL_14) 0) (= (mod (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* .cse2 (- 1))) .cse3) 0) (not (= (+ (* v_main_~a~0_BEFORE_CALL_15 (div (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* (- 1) .cse2)) .cse3) v_main_~z~0_BEFORE_CALL_14 v_main_~z~0_BEFORE_CALL_14) v_main_~x~0_BEFORE_CALL_9) (+ v_main_~a~0_BEFORE_CALL_15 (* v_main_~z~0_BEFORE_CALL_14 v_main_~x~0_BEFORE_CALL_9)))) (not (= .cse3 0))))))))) is different from false [2021-05-02 15:27:47,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:47,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:49,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:49,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:49,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:49,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:49,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:49,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:49,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:51,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:51,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:51,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:51,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:51,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:51,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:51,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:51,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:53,769 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0_BEFORE_CALL_15 Int) (v_main_~z~0_BEFORE_CALL_14 Int) (v_main_~x~0_BEFORE_CALL_9 Int)) (let ((.cse0 (+ (* v_main_~a~0_BEFORE_CALL_15 (- 1)) v_main_~x~0_BEFORE_CALL_9))) (let ((.cse2 (div .cse0 v_main_~z~0_BEFORE_CALL_14))) (let ((.cse1 (* v_main_~z~0_BEFORE_CALL_14 .cse2)) (.cse3 (* v_main_~a~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_14))) (and (not (= v_main_~z~0_BEFORE_CALL_14 0)) (= (mod .cse0 v_main_~z~0_BEFORE_CALL_14) 0) (= (mod (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* .cse2 (- 1))) .cse3) 0) (not (= (+ (* v_main_~a~0_BEFORE_CALL_15 (div (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* (- 1) .cse2)) .cse3) v_main_~z~0_BEFORE_CALL_14 v_main_~z~0_BEFORE_CALL_14) v_main_~x~0_BEFORE_CALL_9) (+ v_main_~a~0_BEFORE_CALL_15 (* v_main_~z~0_BEFORE_CALL_14 v_main_~x~0_BEFORE_CALL_9)))) (not (= .cse3 0))))))) is different from false [2021-05-02 15:27:55,779 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0_BEFORE_CALL_15 Int) (v_main_~z~0_BEFORE_CALL_14 Int) (v_main_~x~0_BEFORE_CALL_9 Int)) (let ((.cse0 (+ (* v_main_~a~0_BEFORE_CALL_15 (- 1)) v_main_~x~0_BEFORE_CALL_9))) (let ((.cse2 (div .cse0 v_main_~z~0_BEFORE_CALL_14))) (let ((.cse1 (* v_main_~z~0_BEFORE_CALL_14 .cse2)) (.cse3 (* v_main_~a~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_14))) (and (not (= v_main_~z~0_BEFORE_CALL_14 0)) (= (mod .cse0 v_main_~z~0_BEFORE_CALL_14) 0) (= (mod (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* .cse2 (- 1))) .cse3) 0) (not (= (+ (* v_main_~a~0_BEFORE_CALL_15 (div (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* (- 1) .cse2)) .cse3) v_main_~z~0_BEFORE_CALL_14 v_main_~z~0_BEFORE_CALL_14) v_main_~x~0_BEFORE_CALL_9) (+ v_main_~a~0_BEFORE_CALL_15 (* v_main_~z~0_BEFORE_CALL_14 v_main_~x~0_BEFORE_CALL_9)))) (not (= .cse3 0))))))) is different from true [2021-05-02 15:27:55,780 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 1 not checked. [2021-05-02 15:27:55,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:27:55,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32748096] [2021-05-02 15:27:55,780 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:27:55,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024906266] [2021-05-02 15:27:55,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024906266] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:27:55,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:27:55,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:27:55,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673371184] [2021-05-02 15:27:55,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:27:55,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:27:55,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:27:55,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=30, Unknown=5, NotChecked=36, Total=90 [2021-05-02 15:27:55,782 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:28:06,540 WARN L838 $PredicateComparison]: unable to prove that (and (or (= c___VERIFIER_assert_~cond 1) (and (= c___VERIFIER_assert_~cond 0) (exists ((v_main_~a~0_BEFORE_CALL_15 Int) (v_main_~z~0_BEFORE_CALL_14 Int) (v_main_~x~0_BEFORE_CALL_9 Int)) (let ((.cse0 (+ (* v_main_~a~0_BEFORE_CALL_15 (- 1)) v_main_~x~0_BEFORE_CALL_9))) (let ((.cse2 (div .cse0 v_main_~z~0_BEFORE_CALL_14))) (let ((.cse1 (* v_main_~z~0_BEFORE_CALL_14 .cse2)) (.cse3 (* v_main_~a~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_14))) (and (not (= v_main_~z~0_BEFORE_CALL_14 0)) (= (mod .cse0 v_main_~z~0_BEFORE_CALL_14) 0) (= (mod (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* .cse2 (- 1))) .cse3) 0) (not (= (+ (* v_main_~a~0_BEFORE_CALL_15 (div (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* (- 1) .cse2)) .cse3) v_main_~z~0_BEFORE_CALL_14 v_main_~z~0_BEFORE_CALL_14) v_main_~x~0_BEFORE_CALL_9) (+ v_main_~a~0_BEFORE_CALL_15 (* v_main_~z~0_BEFORE_CALL_14 v_main_~x~0_BEFORE_CALL_9)))) (not (= .cse3 0))))))))) (= |c___VERIFIER_assert_#in~cond| c___VERIFIER_assert_~cond)) is different from false [2021-05-02 15:28:36,411 WARN L205 SmtUtils]: Spent 25.79 s on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-05-02 15:28:38,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:28:38,580 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2021-05-02 15:28:38,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:28:38,581 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-05-02 15:28:38,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:28:38,582 INFO L225 Difference]: With dead ends: 39 [2021-05-02 15:28:38,582 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 15:28:38,582 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 43217.8ms TimeCoverageRelationStatistics Valid=30, Invalid=50, Unknown=8, NotChecked=68, Total=156 [2021-05-02 15:28:38,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 15:28:38,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 15:28:38,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 15:28:38,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 15:28:38,583 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2021-05-02 15:28:38,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:28:38,583 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 15:28:38,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:28:38,583 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 15:28:38,583 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 15:28:38,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 15:28:38,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 15:28:41,133 WARN L205 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 72 DAG size of output: 48 [2021-05-02 15:28:53,541 WARN L205 SmtUtils]: Spent 12.41 s on a formula simplification. DAG size of input: 92 DAG size of output: 1 [2021-05-02 15:29:33,277 WARN L205 SmtUtils]: Spent 39.73 s on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-05-02 15:29:35,542 WARN L205 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 73 DAG size of output: 48 [2021-05-02 15:29:35,546 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2021-05-02 15:29:35,546 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2021-05-02 15:29:35,546 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2021-05-02 15:29:35,546 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:29:35,546 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2021-05-02 15:29:35,546 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:29:35,546 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:29:35,546 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (<= ~counter~0 0) [2021-05-02 15:29:35,546 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 15:29:35,546 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:29:35,547 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 11 13) no Hoare annotation was computed. [2021-05-02 15:29:35,547 INFO L198 CegarLoopUtils]: For program point L12(line 12) no Hoare annotation was computed. [2021-05-02 15:29:35,547 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2021-05-02 15:29:35,547 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2021-05-02 15:29:35,547 INFO L198 CegarLoopUtils]: For program point L34-1(lines 34 43) no Hoare annotation was computed. [2021-05-02 15:29:35,547 INFO L194 CegarLoopUtils]: At program point L34-3(lines 34 43) the Hoare annotation is: (let ((.cse1 (= (* main_~z~0 main_~a~0) main_~az~0)) (.cse0 (= main_~a~0 main_~x~0))) (or (not (<= |old(~counter~0)| 0)) (and .cse0 (= main_~y~0 1) (<= ~counter~0 0) .cse1) (let ((.cse3 (= main_~z~0 0))) (let ((.cse8 (and .cse0 .cse3))) (and .cse1 (or (let ((.cse2 (+ main_~x~0 (* main_~a~0 (- 1))))) (and (= (mod .cse2 main_~z~0) 0) (not .cse3) (let ((.cse4 (div .cse2 main_~z~0))) (let ((.cse6 (= main_~az~0 0)) (.cse5 (* main_~z~0 .cse4))) (or (and (= .cse4 (+ .cse5 main_~a~0)) .cse6) (let ((.cse7 (+ .cse5 (* .cse4 (- 1)) main_~a~0))) (and (not .cse6) (= (* (div .cse7 main_~az~0) main_~z~0) main_~y~0) (= (mod .cse7 main_~az~0) 0)))))))) .cse8) (or .cse8 (= (mod main_~y~0 main_~z~0) 0))))))) [2021-05-02 15:29:35,547 INFO L194 CegarLoopUtils]: At program point L34-4(lines 34 43) the Hoare annotation is: (or (let ((.cse1 (+ main_~x~0 (* main_~a~0 (- 1))))) (and (let ((.cse0 (div .cse1 main_~z~0))) (= (+ (* main_~z~0 .cse0) main_~a~0) (+ (* main_~az~0 (div main_~y~0 main_~z~0)) .cse0))) (= (mod .cse1 main_~z~0) 0) (= (* main_~z~0 main_~a~0) main_~az~0) (not (= main_~z~0 0)) (= (mod main_~y~0 main_~z~0) 0))) (not (<= |old(~counter~0)| 0)) (= (+ main_~x~0 (* main_~y~0 main_~az~0)) (+ main_~a~0 (* main_~x~0 main_~z~0)))) [2021-05-02 15:29:35,547 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 22 46) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (<= ~counter~0 0)) [2021-05-02 15:29:35,547 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 22 46) no Hoare annotation was computed. [2021-05-02 15:29:35,547 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 22 46) no Hoare annotation was computed. [2021-05-02 15:29:35,547 INFO L198 CegarLoopUtils]: For program point L44(line 44) no Hoare annotation was computed. [2021-05-02 15:29:35,547 INFO L194 CegarLoopUtils]: At program point L35(line 35) the Hoare annotation is: (let ((.cse1 (= (* main_~z~0 main_~a~0) main_~az~0)) (.cse0 (= main_~a~0 main_~x~0))) (or (not (<= |old(~counter~0)| 0)) (and (<= ~counter~0 1) .cse0 (= main_~y~0 1) .cse1) (let ((.cse3 (= main_~z~0 0))) (let ((.cse8 (and .cse0 .cse3))) (and .cse1 (or (let ((.cse2 (+ main_~x~0 (* main_~a~0 (- 1))))) (and (= (mod .cse2 main_~z~0) 0) (not .cse3) (let ((.cse4 (div .cse2 main_~z~0))) (let ((.cse6 (= main_~az~0 0)) (.cse5 (* main_~z~0 .cse4))) (or (and (= .cse4 (+ .cse5 main_~a~0)) .cse6) (let ((.cse7 (+ .cse5 (* .cse4 (- 1)) main_~a~0))) (and (not .cse6) (= (* (div .cse7 main_~az~0) main_~z~0) main_~y~0) (= (mod .cse7 main_~az~0) 0)))))))) .cse8) (or .cse8 (= (mod main_~y~0 main_~z~0) 0))))))) [2021-05-02 15:29:35,548 INFO L198 CegarLoopUtils]: For program point L35-1(lines 34 43) no Hoare annotation was computed. [2021-05-02 15:29:35,548 INFO L198 CegarLoopUtils]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-05-02 15:29:35,548 INFO L198 CegarLoopUtils]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-05-02 15:29:35,548 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2021-05-02 15:29:35,548 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2021-05-02 15:29:35,548 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2021-05-02 15:29:35,548 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-05-02 15:29:35,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:29:35 BoogieIcfgContainer [2021-05-02 15:29:35,560 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:29:35,561 INFO L168 Benchmark]: Toolchain (without parser) took 361679.28 ms. Allocated memory was 179.3 MB in the beginning and 216.0 MB in the end (delta: 36.7 MB). Free memory was 142.9 MB in the beginning and 192.2 MB in the end (delta: -49.3 MB). Peak memory consumption was 106.2 MB. Max. memory is 8.0 GB. [2021-05-02 15:29:35,561 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 179.3 MB. Free memory is still 159.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:29:35,561 INFO L168 Benchmark]: CACSL2BoogieTranslator took 204.32 ms. Allocated memory is still 179.3 MB. Free memory was 142.8 MB in the beginning and 133.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 15:29:35,561 INFO L168 Benchmark]: Boogie Preprocessor took 52.61 ms. Allocated memory is still 179.3 MB. Free memory was 133.0 MB in the beginning and 161.8 MB in the end (delta: -28.8 MB). Peak memory consumption was 2.4 MB. Max. memory is 8.0 GB. [2021-05-02 15:29:35,561 INFO L168 Benchmark]: RCFGBuilder took 342.64 ms. Allocated memory is still 179.3 MB. Free memory was 161.8 MB in the beginning and 146.1 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 15:29:35,562 INFO L168 Benchmark]: TraceAbstraction took 361074.66 ms. Allocated memory was 179.3 MB in the beginning and 216.0 MB in the end (delta: 36.7 MB). Free memory was 146.1 MB in the beginning and 192.2 MB in the end (delta: -46.1 MB). Peak memory consumption was 110.1 MB. Max. memory is 8.0 GB. [2021-05-02 15:29:35,562 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 179.3 MB. Free memory is still 159.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 204.32 ms. Allocated memory is still 179.3 MB. Free memory was 142.8 MB in the beginning and 133.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 52.61 ms. Allocated memory is still 179.3 MB. Free memory was 133.0 MB in the beginning and 161.8 MB in the end (delta: -28.8 MB). Peak memory consumption was 2.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 342.64 ms. Allocated memory is still 179.3 MB. Free memory was 161.8 MB in the beginning and 146.1 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 361074.66 ms. Allocated memory was 179.3 MB in the beginning and 216.0 MB in the end (delta: 36.7 MB). Free memory was 146.1 MB in the beginning and 192.2 MB in the end (delta: -46.1 MB). Peak memory consumption was 110.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 304240.6ms, OverallIterations: 10, TraceHistogramMax: 4, EmptinessCheckTime: 14.4ms, AutomataDifference: 206331.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 56761.2ms, InitialAbstractionConstructionTime: 9.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 172 SDtfs, 70 SDslu, 587 SDs, 0 SdLazy, 301 SolverSat, 20 SolverUnsat, 24 SolverUnknown, 0 SolverNotchecked, 51832.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 237 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 211911.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=8, InterpolantAutomatonStates: 72, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 67.6ms AutomataMinimizationTime, 10 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 8 LocationsWithAnnotation, 19 PreInvPairs, 30 NumberOfFragments, 359 HoareAnnotationTreeSize, 19 FomulaSimplifications, 285 FormulaSimplificationTreeSizeReduction, 51.8ms HoareSimplificationTime, 8 FomulaSimplificationsInter, 1210 FormulaSimplificationTreeSizeReductionInter, 56701.1ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 98.3ms SsaConstructionTime, 449.7ms SatisfiabilityAnalysisTime, 94605.2ms InterpolantComputationTime, 229 NumberOfCodeBlocks, 197 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 219 ConstructedInterpolants, 6 QuantifiedInterpolants, 1766 SizeOfPredicates, 20 NumberOfNonLiveVariables, 1345 ConjunctsInSsa, 146 ConjunctsInUnsatCore, 10 InterpolantComputations, 3 PerfectInterpolantSequences, 97/130 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (!(\old(counter) <= 0) || (((a == x && y == 1) && counter <= 0) && z * a == az)) || ((z * a == az && ((((x + a * -1) % z == 0 && !(z == 0)) && (((x + a * -1) / z == z * ((x + a * -1) / z) + a && az == 0) || ((!(az == 0) && (z * ((x + a * -1) / z) + (x + a * -1) / z * -1 + a) / az * z == y) && (z * ((x + a * -1) / z) + (x + a * -1) / z * -1 + a) % az == 0))) || (a == x && z == 0))) && ((a == x && z == 0) || y % z == 0)) RESULT: Ultimate proved your program to be correct! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...